Update changelog.

Author: jverswijver

docs-parts/intro/Releases_lang1.rst

@@ -6,7 +6,7 @@
 * Bugfix - `ExternalTable.delete` should not remove row on error (#953) PR #956
 * Bugfix - Fix error handling of remove_object function in `s3.py` (#952) PR #955
 * Bugfix - Fix assertion error when performing a union into a join (#930) PR #967
-* Bugfix - Fix regression issue with ``DISTINCT`` and ``GROUP_BY`` clause (#914) PR #963
+* Bugfix - Fix regression issue with `DISTINCT` clause and `GROUP_BY` (#914) PR #963
 
 0.13.2 -- May 7, 2021
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